Peening tool

ABSTRACT

APPARATUS FOR EFFECTING A PEENING OPERATION IN WHICH THE PEENING ELEMENTS ARE CONFINED IN STRUCTURE AS COMPARED TO CONVENTIONAL &#34;FREE THROW&#34; METHODS. SPECIFICALLY THE SUBJECT APPARATUS IS ADAPTED TO PEEN THE SURFACE OF A CIRCULAR BORE OR PASSAGEWAY IN WHICH RECIPROCAL MOVVEMENT IS IMPARTED TO THE PEENING ELEMENTS BY ROTATION OF AN ACTUATING MEMBER OF NOVEL CONSTRUCTION. COMPLETE COVERAGE (PEENING) OF THE AFOREMENTIONED BORE IS INSURED IN THAT ROTATIONAL AND LENGTHWISE MOVEMENT OF THE HOUSING OR CASING IS MANUALLY IMPARTED THERETO.

()ct. 5, 1971 A, K. FoEDlscH 3,610,008

PBENING OoL Fi1ed June 27, 1969 2 SheetS-Sheet 1 IInited States Patent o837 039 No Int. CL B21c 7/o; BZ1b U.S. CL 727 Clmms ABSTRACT of THEDISCLoSURE AppafatuS fof e1fecting a peenin opefatlon ln whlch thepeening eleT1entS afe conned ln Stfuctufe a coff1 pafed to conventionalffee thfow fnethods. spec1Hcany the subiect appafatus iS adapted to peentho Sufface of a cifc111af bofe of paSSagevay in vvhich fecpfoca1o1ovefnent iS ifnpafted to the peenfng e1eITlentS oy fotat1on of anactuating Ine[nbef of nove1 conStfuctlon. Complete Covefage (peening) ofthe afofefflenfioned bofe IS lnSufed in that fotationa1 and 1engthwiSeInovement of the hoUS ing of caSing iS Inanuany ifnpafted thefeto.

ThiS app1ication iS a continuationinpaft of ouf ap p1ication Sef. No.698,478, f11ed 1an. 17. 1968. Shot peen ing pfoceSSeS have ceaSed to bea. tfia1 and effof opofa fion but have developed into a cloSe1y dennednlechanloal opefation, cafefUHy contfo11ed and capab1e of pfoduclngUnffofn1 fesultS conSistent with den1andS of today,S n1aSS pfoductionnlethodS.

PfocedufeS aS o11t1ined above neceSSafi1y place feStf1c tions and1iInitationS on the opefation, howevef, additiona1 feStfictionS havefecent1y been Set fofthin fact de Inandedto f11fthef iInpfove thesefviceability of an afticle tfeated by Shot peening nlethods. 1 ofeXafnple, to fuff11ef ifnpfove the quality of a pfoducf fequifeInentShave fecent1y been Set fofth fequifing the Shot to Stfike (iInpact) theSufface of an aftic1e in a difection noffnal to the Sufface.

specincany, IniHtafy and othef specif1cationS quite ffe quent1y setfofth that the sufface of apeftufeS, paSsage wayS etc., be peened in aInannef in which the Shot Stfike (in1pact) nofna1 to the sI1ffacethefeof. To the beSt of applicant,S knovvledge, this pfocedufe haS notbeen poS sib1e utiHzing pfeSent1y known methodS, thiS iS pafticulaf- 1ytfIle in caSeS vVhofe the sufface of bofeS, paSSageVays etc., nluSt bepeened in the f1eld.

FI(. 1 conStitutes a 1ongitudina1 Sectional view of a pfefeffedembodiment of the peening too1 diScloSed hefein, the vieW being taken onthe line 11 of FIG. 3.

FIG. 2 is a view Sifn1iaf to FIG. 1 of anothef eInbodi n1ent of thepeeningtoo1diScloSed hefein.

FIG. 3 iS a sectfonal view of the peening too1 of FIG. 1 vieWed aSindicated by the 1ine 33 of FIG. 1.

FIG. 4 iS a cfoSS-Sectiona1 view of an indiv1dua1 face of the too1 ofFIG. 1 of 2.

FIG. 3 iS a 1ongitudina1 Sectiona1 view of anothef em bodiInent of thepeening tool diSCloSed hefein.

F1(3. 6 iS a Sectiona1 view taken on the line o8 of F1G. 5.

Refeffing to the dfavvingS, a pfefeffed embodiment of the peening too111 aS diSc1oSed hefein iS Shown in FIG. 1. The tool 11 iS 11ti1ized topeen a passageVvay 12 of cifculaf cfosS-Section pfovided in theSt1Jctufe 14.

The too1 11 includeS a face aSSen1bly 16 having innef and oufefdiaInetefS X and Y, feSpectively, With a p1Ll fa1ity of peeninge1eInentS 17 Inonnted thefein and a plungef Inen1bef 18 funcfioning toeXcife the eleInentS 17.

The ovefaH conngufaHon of the membef 18 is beSt Seen by fefeffing toFIG. 3. The maximum diametef of the membef 18 is sIlCh that it haS affee (funning) f1t with feSpect to tho inside diafnefef of the faceaSSefnb1y 16. The onfef sufface of the membef 18 iS pfovided Withcoffugations de11ning a p1ufaty of high and 1ow pointS aS indicated byfhe numefalS 18 and 21, feSpectively. A bore 22. cifcu1af incfosSSecti0n, eXtends thfoughout the 1ength of the nlefnbef 18, the aXiSof the bofe coinciding With the aXiS of the membef 18. The length of themembef 18 iseqlla1 to the 1ength of aSSefnbly 16 and itS 1ength S1ightlyeXceedS the width of the stfuctufe 14 (paSSage vvay 12) aS beSt Seen inFI(1. 1.

The aSSeIIbly 1oinc1udeS a plufality of fndfvidua1 face asSemb1ies 24,detans and construction of which are shown in FIG. 4. EaCh of the faceaSSemb1ieS 24 includes fight and left hand face membefS 26 and 27.fespectively, the only diffefence befween the nfen1befs 2o and 27 beingthat one caffieS a plufaHty of pins 28 (FIG. 3) while the othef haS aplufality of bofeS (not Shown) foffned thefein adapted to feceive thepfnS 28 of a coffeSponding face nlen1bef. thus, the connection of thefnen1befs 26 and 27 iS e1fected.

In the aSSenb1ed fe1ation of the men1befs 2G and 27 (F1G. 4), it Will beseen that theif intefna1 conStfuction is SUch thaf they coopefate fodeHne a plufa1ity of SUb stantia11y SphefiCal cavitieS identiHed by thenUmefa1 29, each adapted fo feceive one of the Sphefica1 InefnbefS 17.The cavities 29 afe S1i ht1y elongated in a fadia1 difeCtion vVithfeSpect to the aSSen1b1y 24 and pfovide openingS on the innef and outefSuffaceS of the aSSeIT1b1ies 24. Thus, the fneInbefS 17 afe ffee tofecipfoCate of fnove back and fofth in planeS pafanel to the centfa1plane of the aSSefnb1ieS 24. Fof pufpoSeS of i11Ilstfation, it isasSumed that Sphefical IIembefS afe oneeighth (.123) inch in dian1etef.In this i1111stfation, the cavitieS 29 afe fofn1ed I1ti1izing fouf fadiiappfoXinlately one-Sfxteenth (.0623) of an inch. Sepafated in fhe p1aneof fhe assefnbly 24 (FIG. 4) and nofma1 thefefo, by .015 CoffeSpond ingfelationS WiH ap 1y aS the diaTnetef of the nefflbefS 17 incfeaSe ofdecfeaSe in size. Thos, it vviH be appafent that the n1eInbefS 17 afeffee to n1ove fifteen thousandths of an inch (.01S) in a difectionpafane1 to the centfa1 p1ane of the aSSefnbly 24. a1So that theITlefnbefS 17 afe to pfotfude S1ightly beyond the innef and oLltefSuffaces 32 and 33 of the aSSeInblieS 24 when fecipfocated.

1/Iaiof cofflponents of the foo1 11 having been deScfibed, a bettefUndefSfanding thefeof and itS opefation vviH be fofthcoming ffofn thefoHovving deScfiption of the nannef in Which the too1 iS aSSeInbIed andthe felationshi S fevailing betWeen the to01 11 and the Stfuctufe 14 afede Scfibed.

In assen1bling the fool 11, the Shaft 23 iS feceived in the bofe 22 ofthe n1efflbef 18 and is positioned adjacent a 11ange 41 conStitUting anintegfal paff of the Shaft 23. ThiS felation, of the Shaft 23 andfnefnbef 18, is fnain tained thfoughout the opefation of the too1 11, inothef wofdS, the membef 18 iS ffXed1y SecUfed fo the Shaft 23. AfneInbef 36 iS novv poSitioned on the Shaft 23 adiacent the Hange 41 bUton the oppoSite Side ffon1 t11e fnen1bef 18. The Shaft 23 and 11ange 41afe of a SiZe and Shape in- SUfing a ffee fotating f1t thefebetween andthe Shaft 23.

A p1Ufality of aSSen1b1ieS 24, equa1 to of Slight1y eX ceeding thelength of the nlefnbef 18, afe now posftioned on shouldef 40 of theInefnbef 36 as shown in FIG. 1 in Sideby-side and Suffounding fe1ationvvith feSpect to the membef 18. The aSSemb1y 18, membef 18 and Shaff 23afe now inSefted in the bofe 12 pfovided in the fneInbef 14.

A nlen1bef 37 iS noW SeCufed to the outef end of the shaft 23 by nleanSof a StIld-1ike bo1t 44. T11e bo1t 44 fUnctionS ten1pofafily to fetainthe membef 37 on the Shaft 23 and thefeaftef as beafing fneanS fof thebo1f 44 and con- Sequently the olIfef end of Shaft 23. In this feSpect affee

